general automatic vent valve will do some preventive maintenance, which can effectively prevent the happening of the fault. Take a look at below automatic fault of the exhaust valve and solution.

1, the leakage between body and cover.

the reason - May be the gasket is damaged, cap nut torque is not enough, seal welding layer damage;

- processing measures Replaceable gasket, check the torque, and seal welding.

2, automatic exhaust valve packing.

reason may be that the filler cap nut torque, damage of the packing itself.

treatment measures. According to the provisions of the torque check and tighten again and replace the new packing.

internal seal failure ( The internal leakage 。

the reason & ndash; — Packaging might be too tight, seal sur

- processing measures You can check the torque, replace the disc spring or readjust the disc spring.

4。 Not complete or too slow to shut down or shut down.

the reason & ndash; — May be manual operating mechanism in the right position, packing is too tight, the Industrial Valves stem stuck, disc spring short cracks;

- processing measures Manual operation can be inspected and FRATOL testing, packaging torque, replace the valve stem assembly, disc spring.

5, automatic exhaust valve cannot open

the reason may be that the standby manual service location error, low air pressure, packing too tight, the valve stem jamming, solenoid valve, or circuit fault;

- processing measures Manual operator can check and FRATOL test, and the air pressure check and reset, check packaging torque, stem component replacement, or electromagnetic valve check valve circuit.

( 6) Actuator side hole leakage.

the reason & ndash; — May be the diaphragm rupture, shaft seal damage;

measures & ndash; — Need to replace the diaphragm and s

7. Automatic exhaust Industrial Valves pneumatic shaft export air leakage.

the reason & ndash; — May be guide ring is broken;

treatment measures. Sealing ring should be replaced.

8, automatic exhaust valve no operation signal.

why & ndash; — May be circuit failure or limit switch failu

- processing measures Check the circuit and the limit switch.

9, can't operation.

the reason - Instrument, electrical, mechanical, and other comprehensive factors;

- processing measures To cope with pneumatic cut-off valve power plant to conduct a comprehensive inspection.

the above is the automatic exhaust valve failure and the solution.

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